Paving-block.



E. J. BARTELLS. 4

Y PAVING BLOCK. APPLICATION FILED IAN. I0: 1916.

W/r/I/Ess 9 v s 1 mlm/rol? Y I II Patented Apr. 10, 1917.

idiom .Jamells wie: #i :i

Specifica-sion of Leners atent.

.ppication le January 20, 1916. No. 'iL-332.

' Seate? in. die county of King'and State of Weshingtoiyiieve invened a certain new and. use'iii improvementijn Pavingoeks. of which ihe olowing is specification My invention relatesivo improvements in paving blocks. and the object of my in- Vention is to provide paving books fo1' street pavements. preferably made of Wood, each of which paving' oioeks shall be 0f such form that when it is isposed 'with o'ner paving blocks of like foim to pave e etreet then cetaii poiftions of it, Shadi make such contact with adjacent other lblocks es simil.

form iiizerstiees therebetween, Within which mteisieee me@ be disposed :i quanti@ of suitebie mateizzi, :is esphatom. cool-tar and l gifivei. 'whereby adjacent ones of said peviiig blc-oke may "ee Seeuref pemenendy in Tche posipious irrespective of changes in them hat may Abe mused 'by expansion and nomination doe o xf'erietions in temperature; ano'hei' object of my 'invention is to provre paving blocks which shell be so formed het when they are disposed in the form of e ereet pavement there shzzli be iin-- terstiees between adjacent ones of them of sucio form 'he when seid in'ters'ces are lef 'with gravel, con] tai" endeari or other Suitable material, then di o sai paving' boeks shei be seeureiy fastened or iockec against ieiaive verilieal movements.

aecompiish these objects by paving bioeke of he forms iiusgmteci in the neoompanyizig rewings 'wherein Figui@y l is e. View in 'pesfpeeive of one form of 'paving biock embodying invention while is a View of ze 'pimffiiy of the Seme fiey .--my eppeei when embodied in a aimee' pavement; 3 is e pian View' of e' phue'ey of paving Moeke eiiibmiying a moaiiiied form @if my iiweiiioi es they may 1 einiaodiec in a, street pavement is e View in goeie., tive of one ig; Moeke shown m i1 ig.

io of the me/ings, i.; which drs-.Winge julie reference numemie mcoefie hkefgazrts. 5 is one form si. e wooenjeving block yeiieboying my Crosseeotion are yeach ef the 'eim. of an pavement, then the jgroiwe veitioei "which interstices E7 may. be

of a ciicie and are disguised edjeeent to einen other o extend vericaiy (iii pomiei ,fvijii the giain of the Woo.) from i.; e boizom edge to the top edge of seid veitieel side, While the hree ei'nziining vei'tiezli sides of said paving block/5 are each. o plane Suffece. TW'hen aV plurality of Rocks, ike *ehe pm ing block 5, are disposed ivo form. e.

of each of Seid paving blocks :3 xviii be efijacent to and in egegemen -wh 'he siii faces vof the non-groove i vertieai sides of two others paving Mook.; 5, as, show-ii in Fig. 2, whereby the grooves 6 simili eilen consi-.itute iiiteistiees, iiereieee whose #fome of emes-section Wfl be pieioeexwei' hm com im', aephaitum, send, ffievei abie mateiei .more 1 ily 'ite geen" paving bioeke in heir iloi'm pos.. in an obvious mamie?.

in Fig. -1 l have Shown by e ;view e. paving block 8 embodying a. mod form of pars of my invention wherein ai?. the Vei'tiQ-a sides of soie paving biof 3 me provideci with grooves 9 whose 'foi-moi? (zi-oss section is aise like am are of e eiiee and uil of which grooves; 9 are disposed io ex'en. in oblique direc-tions between the botom :m the top? edges of said paving; Mooi; Wiiee 23e by whenone of Seid pm'iiig; 'booige S iis-- @sed with :i verticali sie'nineeii to and m Contact with the verioni Sie enohe paving block 8 then the axes of 'c-ee 'eepee tive grooves 9 of the adjacent sides ef *me .paving bioC-ks Wiil oe in oppesiteiy obliquo direction? so that the interstiees, :se the iii- .eisices 10 of Fig'. 3. Wil ebieueiy be of such complex iiiteunei form es 'wii Seed of being euri/'ew Uner oidinzu" Condiuionsf. of use ii, found to be mineoesealy pi-oirie 9 on either of the vesieni sufi-fir* two ends of the paving Moeke b grooves S on the izugei Voiitimii e'nereof serve te form iecefaeee jacent paving *decke S which suitable material disposed therein Will adequately `serve to Obviously, paving blocks of the form of the paving blocks 5 of Figs. l and 2 can be manufactured more cheaply than the paving blocks 8 of Figs. 3 and 4 but the latter are a much superior product since the obliquely disposed grooves 9 serve better as a locking element in combination with gravel than do the grooves of the paving blocks 5. A pavementforrned of blocks as disclosed by the present application includes many advantageous features over wooden pavements previously patented as has been'proved by actual experience, the blocks in a pavement being subjected to changes in the degree of moisture, and it has been found that when so soaked with Water, that the blocks expand, causing the sharp ridges forming the divisions of the channels in the faces of the block to cut into the sides of the adjacent block'. It is to be noted that when the blocks y dry out and contract, the block adjacent t0 the sharp ridges re-assumes its plane surfaces, thus maintaining such point between adjacent blocks as will Akeep the blocks tightly in place. In fact, there is always a yielding tight joint'between adjacent blocks irrespective of any filling that may be introduced into the intervening spaces.

Manifestly, paving blocks embodying my invention may be made of other material for instance, concrete or a be made in the dimensions and arrangement v Copies ofthis patent may be obtained for five cents each, by addressing the.Commissioner of Patents Washington, I). C.

lock said blocks against- .relative vertical movements.

the bottom edge of parts of my invention without departing tending throughout said sides from bottom to i top, avhereby the opposite diagonal or crossing grooves filled in with concrete or plastic material will have an interlocking' action.

2. A wooden paving block having chosen vertical sides provided with a series of grooves of curved cross section extendin in parallelism with thegrain of the wood from to the top edge of said block, said grooves being disposed sothat the curved cross sectional lines of adjacent ones of said grooves shall intersect each other whereby' is provided a ridge whose apex is sharp and Whose base is of a width equal to the distance between the apexes of adjacent ones of said ridges.

3. A paving block formed of material capable of expansion and contraction having chosen portions of the outer sides pro- .vided with continuous depressions divided by sharpened ridges.

In Witness whereof7 I hereunto subscribe my naine this 27 th day of December, A. D., 1915.

EDWIN J. BARTELLS.

Witnesses:

FRANK WARREN, O. JoHNsoN. 

